Hopping up the 500 Cadillac
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*549 ft/lbs torque @ 3200 rpm, yet still made 502 ft/lbs @ 4600 rpm | *549 ft/lbs torque @ 3200 rpm, yet still made 502 ft/lbs @ 4600 rpm | ||
*442 hp @ 4500 rpm, and still showing 438 @ 5100 rpm | *442 hp @ 4500 rpm, and still showing 438 @ 5100 rpm | ||
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| + | ==Another example== | ||
| + | The following dyno results were from a 518 cid Cadillac engine. 10.5 to 1 compression, hydraulic roller cam with 246 degrees duration at 0.050" and 0.620" lift. Single pattern cam on a 112 degree + 2 degree LSA. CNC ported MTS aluminum heads and single plane intake. MTS 1.7 to 1 rockers and a Troy Patterson 1100 CFM 4150 carb. MTS ignition system. | ||
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| + | Peak HP (620) occurred at 5200 RPM and peak torque (643) occurred at 4700 RPM. At 2600 RPM (the lowest rpm a reading could be obtained), torque was 543 and by 2900 it was 575 and at 5400 RPM was at 590.9. That's a pretty flat torque "curve". The average torque from 2600 rpm to 5300 was 606.6. This engine was run on 89 octane fuel. Timing was set at 30 degrees btdc where prior engines run on 93 liked about 6* more. This engine would also idle at 600 rpm. | ||
==Also see== | ==Also see== | ||
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[[Category:Engine]] | [[Category:Engine]] | ||
[[Category:GM]] | [[Category:GM]] | ||
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| + | Hot rodding the cadillac 472 500 by Bloodviking | ||
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| + | I hot rodded these engines back in the 80s and boy did it suck. | ||
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| + | The can I? , or should i hot rod a cadillac 472 500 engine question has been asked since about 1968. Other cadillac engines made before had some success. The 331,390,429. | ||
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| + | A cadillac 472 500 is a Pontiac engine. Put in a Cadillac. | ||
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| + | You really need to replace everything if your going to build a sound cadillac engine except for the block. The blocks are the strongest part of the engine. The entire valvetrain needs an adjustable aftermarket set. Valves included need replaceing. New cam. No reprints. A shimed up oil pump. A rear sump and pan is usually needed as most 472 and 500s are front sump. Some engines are Mid sump works in some Chrysler chassis. Rear sump in chevy and Pontiacs and front sump for ford. Deville front sump, siville mid sump, Eldorado rear sump. You must get the pickup designed for that pan. They do not interchange. Aftermarket balancer, forged rods, forged pistons. So the crank and block are good. The crank is heavy. Not good for quick throttle response. If you turn the mains down and over board the block to 4.440 you'll weaken everything. I was told you can go to a large 4.440 bore. I've never tried it. Not worth it I'm sure.you have to have the flexplate redrilled for a standard chevy tork converter. They peak at about 5000 rpm no matter what you do short of destroking them. The 425 seems to be a hated motor.no one hod rods them. But they do have a liter crankshaft in them. If you have loads of money then it can work out for you. I've never seen an aftermarket hi performance pump, or new casting design, made for these engines. Don't expect a 7500 rpm runner here. | ||
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| + | As time goes on the aftermarket support makes these blocks more attractive. I'm told they can take 3000 hp by the nhra engine builders. The crank won't I'm sure. No 4340 cranks yet available. | ||
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| + | Mix the wrong cc heads and you get a 12.5 to 1 comp ot 7 to 1. Not all heads interchange well. Hardened valves are much needed. Stock heads need major porting or just buy the newest cnc heads available on the market. They may set you back 5k. | ||
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| + | With loads of money and aftermarket support you can do it. You can build a chevy 427 for less. | ||
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| + | Bloodviking | ||
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